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Finding the Fourth Proportional to 85,890, 118,528.20 and 48,164.40

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Solution

The fourth proportional to 85,890, 118,528.20 and 48,164.40 is: 66,466.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,890 : 118,528.20 = 48,164.40 : x
  2. Step 2: Convert to fraction form
    85,890/118,528.20 = 48,164.40/x
  3. Step 3: Cross multiply
    85,890x = 118,528.20 × 48,164.40
  4. Step 4: Simplify right side
    85,890x = 5,708,839,636.08
  5. Step 5: Solve for x
    x = 5,708,839,636.08/85,890
  6. Step 6: Final answer
    x = 66,466.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.